OBJECTIVES: I. Determine the safety and the maximum tolerated dose of vaccines containing two adenoviral vectors encoding the melanoma antigens Melan-A/MART-1 and gp100 in patients with stage II-IV melanoma. II. Assess the dose-response changes in the frequency of MART-1 and gp100 reactive T cells (CD4+ and CD8+) in patients receiving one of three different vaccine regimens. III. Assess the T-cell response to one melanoma antigen following three treatments with the other antigen in these patients. IV. Assess the effect of concomitant vaccination with both antigens on T-cell response in these patients.